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Chapter 7: Problem 106

Arrange the following groups of atoms in order of increasing size. a. \(\mathrm{Rb}, \mathrm{Na}, \mathrm{Be}\) b. \(\mathrm{Sr}, \mathrm{Se}, \mathrm{Ne}\) c. \(\mathrm{Fe}, \mathrm{P}, \mathrm{O}\)

Short Answer

Expert verified
The order of increasing atomic size for the given groups of atoms are: a. \(\mathrm{Be} < \mathrm{Na} < \mathrm{Rb}\) b. \(\mathrm{Ne} < \mathrm{Se} < \mathrm{Sr}\) c. \(\mathrm{O} < \mathrm{P} < \mathrm{Fe}\)

Step by step solution

01

Locate elements in the periodic table

Using a periodic table, determine the position of each element: - Rb (Rubidium) belongs to period 5 and group 1 (alkali metals) - Na (Sodium) belongs to period 3 and group 1 (alkali metals) - Be (Beryllium) belongs to period 2 and group 2 (alkaline-earth metals)
02

Order elements by size

Based on the position of these elements in the periodic table, we observe: - Rb has the greatest size (moving down the group) - Na is larger than Be (moving to group 1, and Na is below Be) Thus, the order of increasing atomic size is: \(\mathrm{Be} < \mathrm{Na} < \mathrm{Rb}\) b. Arrange \(\mathrm{Sr}, \mathrm{Se}, \mathrm{Ne}\) in order of increasing size.
03

Locate elements in the periodic table

Identify the positions of each element in the periodic table: - Sr (Strontium) belongs to period 5 and group 2 (alkaline-earth metals) - Se (Selenium) belongs to period 4 and group 16 (chalcogens) - Ne (Neon) belongs to period 2 and group 18 (noble gases)
04

Order elements by size

Considering their positions in the periodic table, we find: - Sr has the largest size (moving down the group) - Se is larger than Ne (both in the same period, Se in a group further to the left) Therefore, the order of increasing atomic size is: \(\mathrm{Ne} < \mathrm{Se} < \mathrm{Sr}\) c. Arrange \(\mathrm{Fe}, \mathrm{P}, \mathrm{O}\) in order of increasing size.
05

Locate elements in the periodic table

Locate the elements in the periodic table and note their positions: - Fe (Iron) belongs to period 4 and group 8 (transition metals) - P (Phosphorus) belongs to period 3 and group 15 (pnictogens) - O (Oxygen) belongs to period 2 and group 16 (chalcogens)
06

Order elements by size

Based on the relative position of these elements in the periodic table, we find: - Fe has the greatest size (furthest down the table) - P is larger than O (both in the same group, P is further down) Hence, the order of increasing atomic size is: \(\mathrm{O} < \mathrm{P} < \mathrm{Fe}\)

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Most popular questions from this chapter

Order the atoms in each of the following sets from the least exothermic electron affinity to the most. a. \(\mathrm{S}, \mathrm{Se}\) b. \(\mathrm{F}, \mathrm{Cl}, \mathrm{Br}, \mathrm{I}\)

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